Dual air jack



FIG. 1 is a perspective view of a dual air jack, showing my new design;

FIG. 2 is a front elevational view of a dual air jack;

FIG. 3 is a rear elevational view of a dual air jack;

FIG. 4 is a left-side elevational view of a dual air jack;

FIG. 5 is a right-side elevational view of a dual air jack;

FIG. 6 is a top plan view of a dual air jack; and,

FIG. 7 is a bottom plan view of a dual air jack.

The broken lines form no part of the claimed design. 

The ornamental design for a dual air jack, as shown and described. 